I need to determine the time period coverage of this dataset. I already have the row and column counts from step-0, but I need to find temporal columns to establish the time range. Let me search for date/timestamp columns across all tables: ```json { "action": "tool_call", "reasoning": "I have row/column counts but need to find temporal coverage. Searching for columns with temporal types (TIMESTAMP, DATE) to identify time-bounded tables.", "tool": "query_sql", "args": { "sql": "SELECT table_name, column_name, phys_type FROM meta.columns WHERE phys_type IN ('TIMESTAMP', 'DATE', 'TIMESTAMP WITH TIME ZONE') ORDER BY table_name, column_name", "purpose": "Find all temporal columns to determine dataset time coverage" } } ```